The radius of the disk is R, and the mass of the disk is M. Using the parallel axis theorem and theequation for the moment of inertia of a disk about its central axis developed in the previous example, Eq. (8), the moment of inertia of the disk about the specified axis is Fig.
Short Circuits. Short circuits are the second most common reason for breaker tripping and are a more serious concern. Short circuits occur when the black hot wires inside your electrical service panel come in contact with either other hot wires or neutral wires.
One of the most common causes of low voltage is the overload of the system. Different times of the day, such as early afternoon, are typically high demand times. As is well known, hot days and weeks of the summer can cause a surge of power demand for air conditioners, a very power hungry set of machines.